Portable air purifier unit



Dec. 28, 1937. E. E. BUSKIRK 2,103,893

PORTABLE AIR PURIFIER UNIT Filed Sept. 22, 195 2 Sheets-Sheet 1 Dec. 28, 1937. BUSKlRK 2,103,893

PORTABLE AIR PURIFIER UNIT Filed Sept. 22, 1956 2 Sheets-Sheet 2 /0 #7 11:1-4: /4 30 z/ W 15 55 3/ K v if w /4 i4! I [I I 7 1 Patented Dec. 28 1937 UNl TED- STATES PATENT OFFICE PORTABLE AIR PURIFIER UNIT Elmore E. Buskirk, Adrian, Mich. Application September 22, 1936, Serial No. 101,981 3 Claims. (01. 183-36) This'invention relates to atmosphere clarifying equipment.

This invention has utility, especially in' dental laboratory portable quiet units, more particularly in conjunction with power tools for grinding, brushing, polishing, and burnishing.

Referring to the drawings:

Fig. 1 is a fragmentary view, with parts broken away, of an embodiment of the invention in the position for use;

Fig. 2 is a view of the device from the left of Fig. 1, the abrading wheel being removed;

Fig. 3 is a plan view of the device of Fig. '1;

Fig. 4 is a section on the line IV-IV, Fig. 2;

Fig. 5 is a section on the line V--V, Fig. 3; and

Fig. 6 is a detail on a reduced scale, showing a volute for the fan or pump.

Dental bench I may have mounted thereon by bracket 2 power shaft 3 operating abrading wheel 4, against which the dentist may hold work, as artificial gums and other parts for finishing attention. The particles thus removed are unusually fine and have a tendency to contaminate the atmosphere of the laboratory and adjacent dental oflice. To keep away from dust and air impurities from such source, it is important to take away these worked off particles by equipment requiring a minimum of space and which is quiet in operation as well as effective to really keep the atmosphere clear.

Under the invention herein the work bench I may have mounted thereon by means of cushions or rubber feet 5, base 6 of a chambered housing unit having wall 1 rising therefrom with slanting side walls 8 merging toward each other, with intermediate side wall 9 extending toward the side wall 1 and spaced therefrom by crown wall portion III, thereby completing particle-collecting chamber II with laterally extending sleeve I2 therefrom oppositely from the side 9. This chamber I I may be effective in assisting collection of particles when it is charged with fibrous material I 3, say excelsior, which may be treated or moistened more readily to have particles adhere thereto, and there is thus provided a filter-promotion particle-collection means which may be replaced or cleansed. Opposite the sleeve I2 and between the crown I II and the side 9 is side wall portion I4 having opening I5 therein, about which may be mounted fiber washer I6 to be engaged by flange I1 of disk I8. Screws I9 clamp this disk into sealing relation.

Supplemental bolts 29 through the disk I8 mount motor housing 2| outside this chamber II. This motor housing 2| provides bearings 22,

, 23, for motor shaft 24 extending through opening 25 in the disk I8 and the opening I5 in the housing wall I4, there to have set screw 26 mount hub 21 of fan disk 28, carrying an annular series of blades 29 in this multi-blade rotary pump 5 which has overhang 30 for rotary clearance as to flange 3| adjacent the sleeve I2. This sleeve I2 provides intake port terminus 32 into which may be fitted cylindrical end 33 of nozzle 34, adapted to conform to the work being given attention, as this power tool having the abrading wheel 4. Accordingly, this multi-blade pump effects the suction through this intake port terminus 32 for drawing air and particles from about the working wheel 4 into this housing to be dispersed by the blades into the material I3 of the chamber II. v Back pressure in this chamber is avoided by considerable area of discharge ports. To this end circular openings 35 are formed in the wall 8 and opening 36 in the wall 9. At these respective circular openings are placed screens 31, 38, having therebetween foraminous or fibrous mass 39 as supplemental filter beyond the filter action of the fibrous material I3. Ring 40 has friction snap coaction with the housing serving as a grip in assembling this supplemental filter. There is accordingly resulting free flow of the filtered air from the chamber II.

Under desired practice herein, the opening 36 is located for direction of draft of air from the 3( chamber II toward and about the motor housing 2|, thereby being an effective factor to keep this motor 2| from excessive heating: Operation of the motor is effected by throwing switch 4| in the motor housing from oil to on position aft-er electric supply cords 42, 43, and conduit 44 are connected with wall fixture 44'. Inasmuch as this connection may be readily severed and. the unit is light weight, small and compact in its direct connection and set-up, it is readily placed into position adjacent the location of the working tools and as readily removed therefrom.

It is a device which may be readily cared for in the cleaning or replacing of filter material or masses, whether in the chamber II or at the 45 openings.

The prime purpose is an effective pull at the intake port in which the pump or fan is located. Clearance 45 about this fan' is such that the pulled-in air may be readily dispersed about the chamber II. However, if it be desired to build up a discharge pressure into the filter material or betterprotect the blades of the fan or pump from the fibrous mass I3, this is efllciently done by providing scroll housing 46 (Fig. 6) to envelop the multi-blade drum of the rotary pump having radial spill, and such radial spill of axially received material is effected tangentially by way of spout 41 for pressure fiow or forcing through the fibrous mass IS in the courses through the various discharge ports.

The portable unit is readily shifted about, for at the bolts l8 are recesses 48 to seat ears IQ of grip or handle 50. This handle is thus effectively assembled by the bolts 19 with the housing chamber mounting the motor.

what is claimed and it is desired to secure by Letters Patent is:

1. An air purifier unit housing embodying a base, there being walls rising from the base to provide a chamber and a fan housing having an opening toward an inlet port terminus, a multiblade fan mounted in the housing and adapted for suction action at the port terminus, there being a shaft for the fan extending outside the housing, a motor on the housing and providing bearing for said shaft, said housing having filter screen discharge ports from the chamber, one at least thereof being directed toward the motor for cooling draft action therefor.

2. An air purifier unit housing embodying a base, there being walls rising from the base to provide a chamber and upwardly narrowed to provide a fan housing portion having an opening toward an inlet port terminus, a multi-blade fan mounted in the fan housing portion and adapted for suction action on the inlet port terminus, there being a shaft for the fan extending outside the housing, and a motor on the housing overhanging said base and providing bearing for said shaft, said housing having filter screen discharge port means from the chamber overhung by said motor.

3. An air purifier unit housing embodying a base, there being walls rising from the base to provide a. chamber having a lateral inlet-port nozzle, a fan in the chamber of said base laterally from the nozzle adapted for suction action at the inlet port nozzle, there being a shaft for the fan, a motor supported by the housing and providing bearing for said shaft, and an outlet port spaced from the inlet port by said housing, there being filter means in said housing between said ports.

ELMORE E. BUSKIRK. 

